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111B1-4 — LOCKNUT,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

111B1-4: LOCKNUT,PIPE.

The LOCKNUT,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: PIPE LOCKNUT, nut_height: 0.250 INCHES NOMINAL IN, thread_class: 2B, thread_series: NPSL, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-350-9620, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
111B1-4
NSN: 4730-00-350-9620
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_stylePIPE LOCKNUT
nut_height0.250 INCHES NOMINAL IN
thread_class2B
thread_seriesNPSL
thread_directionRIGHT-HAND
countersink_angle45.0 DEGREES NOMINAL NUT
width_across_flats0.840 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
packing_recess_depth0.060 INCHES NOMINAL IN
packing_recess_diameter0.660 INCHES NOMINAL IN
thread_quantity_per_inch18
NSN4730-00-350-9620
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 111B1-4 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.840 INCHES NOMINAL IN
•
PACKING RECESS DIAMETER: 0.660 INCHES NOMINAL IN
•
THREAD SERIES: NPSL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT HEIGHT: 0.250 INCHES NOMINAL IN
•
COUNTERSINK ANGLE: 45.0 DEGREES NOMINAL NUT
•
NUT STYLE: PIPE LOCKNUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.840 INCHES NOMINAL IN
PACKING RECESS DIAMETER0.660 INCHES NOMINAL IN
THREAD SERIESNPSL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT HEIGHT0.250 INCHES NOMINAL IN
COUNTERSINK ANGLE45.0 DEGREES NOMINAL NUT
NUT STYLEPIPE LOCKNUT
THREAD CLASS2B
THREAD QUANTITY PER INCH18
SUBSTITUTES & CROSS-REFERENCES 2
140563Reference document
Same NSN cross-reference
Reference document — Secondary reference
210P-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 111B1-4?
111B1-4 is a LOCKNUT,PIPE.
What parts can replace 111B1-4?
There are 2 known substitutes for 111B1-4: 140563, 210P-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 111B1-4?
111B1-4 is cataloged in the U.S. Government catalog under NSN 4730-00-350-9620. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.